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WO2002073330A3 - System for determining a communication path through a translation device - Google Patents

System for determining a communication path through a translation device Download PDF

Info

Publication number
WO2002073330A3
WO2002073330A3 PCT/IB2002/001957 IB0201957W WO02073330A3 WO 2002073330 A3 WO2002073330 A3 WO 2002073330A3 IB 0201957 W IB0201957 W IB 0201957W WO 02073330 A3 WO02073330 A3 WO 02073330A3
Authority
WO
WIPO (PCT)
Prior art keywords
telephony client
client
port number
located behind
address
Prior art date
Application number
PCT/IB2002/001957
Other languages
French (fr)
Other versions
WO2002073330A2 (en
Inventor
Fu-Hua Liu
Cheng Shih-An
Chang Chen-Huei
Lee Chih-Ping
Original Assignee
Innomedia Pte Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/788,865 external-priority patent/US6993012B2/en
Priority claimed from US09/819,492 external-priority patent/US6928082B2/en
Application filed by Innomedia Pte Ltd filed Critical Innomedia Pte Ltd
Priority to AU2002307845A priority Critical patent/AU2002307845A1/en
Publication of WO2002073330A2 publication Critical patent/WO2002073330A2/en
Publication of WO2002073330A3 publication Critical patent/WO2002073330A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
    • H04L63/0209—Architectural arrangements, e.g. perimeter networks or demilitarized zones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/256—NAT traversal
    • H04L61/2564—NAT traversal for a higher-layer protocol, e.g. for session initiation protocol [SIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/256—NAT traversal
    • H04L61/2575—NAT traversal using address mapping retrieval, e.g. simple traversal of user datagram protocol through session traversal utilities for NAT [STUN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/256—NAT traversal
    • H04L61/2578—NAT traversal without involvement of the NAT server
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/256—NAT traversal
    • H04L61/2585—NAT traversal through application level gateway [ALG]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/75—Media network packet handling
    • H04L65/765—Media network packet handling intermediate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/618—Details of network addresses
    • H04L2101/663—Transport layer addresses, e.g. aspects of transmission control protocol [TCP] or user datagram protocol [UDP] ports

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Hardware Design (AREA)
  • Computer Security & Cryptography (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • General Business, Economics & Management (AREA)
  • Business, Economics & Management (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Computer And Data Communications (AREA)
  • Telephonic Communication Services (AREA)

Abstract

A method of audio communication utilizing media datagrams between a first telephony client (28) located behind a network address translation (NAT) server (26) and a remote second telephony client (22) is disclosed. Each client (28)(22) utilizes a single port number for both sending and receiving media datagrams. A media datagram is sent from the first telephony client (28) to the second telephony client (22) on a UDP/IP channel utilizing a destination IP address and port number provided by the second telephony client (26). The second telephony client (22) extracts the Source IP address and source port number from the received media datagram (130) to determine if the first telephony client (28) is located behind a NAT server (26). If the first telephony client (28) is located behind a NAT server (26), the extracted Source IP address and port number are Stored (134) and used to send media datagrams to the first telephony client (28) located behind the NAT server.
PCT/IB2002/001957 2001-02-20 2002-02-16 System for determining a communication path through a translation device WO2002073330A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002307845A AU2002307845A1 (en) 2001-02-20 2002-02-16 System for determining a communication path through a translation device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US09/788,865 2001-02-20
US09/788,865 US6993012B2 (en) 2001-02-20 2001-02-20 Method for communicating audio data in a packet switched network
US09/819,492 US6928082B2 (en) 2001-03-28 2001-03-28 System and method for determining a connectionless communication path for communicating audio data through an address and port translation device
US09/819,492 2001-03-28

Publications (2)

Publication Number Publication Date
WO2002073330A2 WO2002073330A2 (en) 2002-09-19
WO2002073330A3 true WO2002073330A3 (en) 2005-10-27

Family

ID=27120844

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2002/001957 WO2002073330A2 (en) 2001-02-20 2002-02-16 System for determining a communication path through a translation device

Country Status (3)

Country Link
US (1) US7050422B2 (en)
AU (1) AU2002307845A1 (en)
WO (1) WO2002073330A2 (en)

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Also Published As

Publication number Publication date
US20020114322A1 (en) 2002-08-22
WO2002073330A2 (en) 2002-09-19
US7050422B2 (en) 2006-05-23
AU2002307845A1 (en) 2002-09-24

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